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Melanosuchus niger (Crocodylia, Alligatoroidea) is one of the six living caimanine species widely distributed throughout the Amazon River basin today. Although there is only one extant species of Melanosuchus, fossil mat...

The cranial base, composed of the midline and lateral basicranium, is a structurally important region of the skull associated with several key traits, which has been extensively studied in anthropology and primatology. I...

Se realizó un estudio métrico con 126 cráneos de Patagonia -38 no deformados (PN), 40 con deformación tabular erecta (PD) y 48 indeterminados (PI)- para evaluar si la deformación artificial produce diferencias crane...

This study describes the adult cranial osteology of the gymnophthalmid lizard Bachia bicolor, and its variation during postnatal development. Descriptions are based on a size series of osteological preparations, includin...

Erythrosuchidae are a globally distributed and important group of apex predators that occupied Early and Middle Triassic terrestrial ecosystems following the Permo-Triassic mass extinction. The stratigraphically oldest k...

The cumulative effect of undernutrition on successive generations was tested. The cranial growth of three generations of undernourished rats (F1, F2, F3) was compared to that of the parental generation (P), in order to (...

The aim of the present study was to discover how intergenerational undernutrition affects the growth of major and minor functional cranial components in two generations of rats. Control animals constituted the parental g...

We analysed the genetic and morphological variation in Philodryas patagoniensis, a widely distributed South American racer snake. Two well-differentiated haplogroups were identified using mitochondrial gene sequences (12...

Understanding the importance of environmental dimensions behind the morphological variation among populations has long been a central goal of evolutionary biology. The main objective of this study was to review the spati...

The braincases of the abelisaurid theropod dinosaurs Abelisauruscomahuensis and Aucasaurus garridoi are described and compared. These two taxa share the presence of a floccular recess that is ‘8’-shaped, the absence ...

Background and purpose: Image-guided radiotherapy (IGRT) for esophageal cancer requires large planning target volume (PTV) margins to account for interfraction variations, increasing radiation-associated side-effects. Co...

The Iwo Eleru skeleton is the only Pleistocene human fossil currently known from Western Africa. Previously, we showed morphological affinities of the Iwo Eleru cranial remains with Pleistocene archaic African specimens,...

The hindlimbs of Accipitriformes are vital for capturing prey. Research on hindlimb musculature has primarily focused on species preferring avian and mammalian prey, whereas piscivorous species have received limited atte...

Abstract The systematics of blind mole rats (Spalacinae), a group of highly specialized subterranean rodents, remain a subject of debate. Within the genus Spalax, the greater blind mole rat (Spalax microphthalmus...

Many of Earth's most biodiverse and biogeochemically active aquatic ecosystems—including groundwater karst systems, turbid estuaries and the deep ocean—are perpetually dark and hydraulically complex, making long-term...

ABSTRACT Background Detailed characterization of arrhythmias can be performed by multiple catheter mapping; but this has not yet been explored in horses. Objectives Perform ultrasound‐guided multiple catheter mapping o...

In this study, we analyzed peripheral nerve anomalies in 15 anuran species spanning multiple developmental stages. Anatomical examinations focused on both the central nervous system—including the olfactory bulbs, telen...

Matrix correlation represents an innovative methodology to evaluate the explanatory power of several hypotheses, by  measuring  their correspondence with observed morphological variation.  In this paper, we present th...

ABSTRACT In veterinary medicine, there are few descriptions in scientific literature referring ultrasound techniques in the cervical region of mules and donkeys. Based on patterns observed in horses, ultrasound-guided in...

Two species of grey foxes are recognized in the Southern Cone of America: Lycalopex griseus, and L. gymnocercus, which were traditionally separated by size and some cranial differences. Morphometric analyses of the skull...

The cranial muscles of three argentinian species of the genus Liophis is described. They present a typical colubroid anatomy, with some interspecific variations. A new muscle of the group of Constrictores dorsalis is des...

Recientes investigaciones acerca de la arqueología de sociedades agroalfareras del territorio que actualmente ocupa la provincia de Córdoba, señalan que existió un proceso de diversificación e intensificación difer...

The fossil record of the South American Pleistocene presents two Equidae taxa: Hippidion Owen and Equus (Amerhippus) Hoffstetter. These equids were possibly sympatric and, although being considered closely related, prese...

El principal centro de crecimiento de la base craneana durante la ontogenia postnatal es la sincondrosis esfeno-basilar (SEB), que permite la elongación de la línea media en el piso craneano. Su actividad de crecimient...